1.

Select themaor product formed from reaction of 2-bromo butane and lacoholic KOH

Answer»

trans `CH_(3)CH=CHCH_(3)`
cis `CH_(3)CH=CHCH_(3)`
`CH_(2)=CHCH_(2)CH_(3)`
`CH_(2)CH=CH_(3)`

Solution :Accroding to Sytzerff's reule, in dehydrohalogenation , the H atom is ELIMINATED fromt eh `BETA-` CARBON atom has fewer NUMBER of hydrogens.Out of 2-butene major product is trans 2-butenebecause it is more STABLE than cis 2-butene, due to less crowding and less Van der Walls' strian.


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